Bluetooth Lego Train Remote

Thanks I've changed it to javascript

the direction works between the number so grater that 100 but less that 200 set this speed

ie

if (dir_val < 200 && dir_val > 100) {
          const sendvalue = new Uint8Array([0x08, 0x00, 0x81, 0x00, 0x01, 0x51, 0x00, 0xce]);
  }